Halloween is a fun and spooky holiday that people celebrate on October 31st each year. But do you know where it comes from, and why we wear scary costumes? Let's explore the history of Halloween and costumes! Halloween started a very long time ago, around 2,000 years ago. It began with an ancient Celtic festival called "Samhain" (pronounced sah-win). The Celts lived in what is now Ireland, the United Kingdom, and France. Samhain was a special time when they celebrated the end of summer and the beginning of winter. The Celts believed that on the night of October 31st, the boundary between the living and the dead was very thin. They thought that the spirits of the dead could come back to Earth on this night. Some people were afraid of these ghosts, so they dressed up in costumes to hide from them. They also lit bonfires to scare the ghosts away. In the 8th century, the Christian church started a holiday called "All Saints' Day" on November 1st. It was a day to remember and honor all the saints. The night before, on October 31st, became known as "All Hallows' Eve," which later turned into "Halloween." Over time, Halloween came to America with immigrants from different countries. People brought their own customs and traditions, and Halloween became a mix of all these traditions. One of these traditions was dressing up in costumes, which became a big part of Halloween. Today, Halloween is a day for fun and creativity. People of all ages wear costumes, but the costumes are not just scary. You can be anything you want – a superhero, a princess, a witch, or even a funny animal. People also go trick-or-treating, where kids dress up in costumes and go door to door asking for sweets. So, when you see people in scary costumes on Halloween, remember that it all began with the Celts who wanted to protect themselves from ghosts. Now, Halloween is a time for everyone to enjoy dressing up and having a spooky good time.